<template>
  <el-card>
    <el-form :inline="true" :model="searchForm" class="demo-form-inline">
      <el-form-item label="时间范围" size="mini">
        <el-date-picker
          v-model="searchForm.data"
          type="datetimerange"
          range-separator="至"
          start-placeholder="开始日期"
          end-placeholder="结束日期"
        >
        </el-date-picker>

        <el-button type="primary" size="mini">查询</el-button>
      </el-form-item>
    </el-form>
    <div>
      <!-- 为 ECharts 准备一个具备大小（宽高）的 DOM -->
      <div ref="probox" style="width: 800px;height:500px;"></div>
    </div>
  </el-card>
</template>

<script>
import Echarts from 'echarts'
export default {
  data() {
    return {
      searchForm: {
        data: []
      }
    }
  },
  mounted() {
    this.orderLines()
  },
  methods: {
    orderLines() {
      // 基于准备好的dom，初始化echarts实例
      const myChart = Echarts.init(this.$refs.probox)

      // 指定图表的配置项和数据
      const option = {
        title: {
          text: '堆叠区域图'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#6a7985'
            }
          }
        },
        legend: {
          data: ['邮件营销', '联盟广告', '视频广告', '直接访问', '搜索引擎']
        },
        toolbox: {
          feature: {
            saveAsImage: {}
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            type: 'category',
            boundaryGap: false,
            data: ['周一', '周二', '周三', '周四', '周五', '周六', '周日']
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ],
        series: [
          {
            name: '邮件营销',
            type: 'line',
            stack: '总量',
            areaStyle: {},
            data: [120, 132, 101, 134, 90, 230, 210]
          },
          {
            name: '联盟广告',
            type: 'line',
            stack: '总量',
            areaStyle: {},
            data: [220, 182, 191, 234, 290, 330, 310]
          },
          {
            name: '视频广告',
            type: 'line',
            stack: '总量',
            areaStyle: {},
            data: [150, 232, 201, 154, 190, 330, 410]
          },
          {
            name: '直接访问',
            type: 'line',
            stack: '总量',
            areaStyle: {},
            data: [320, 332, 301, 334, 390, 330, 320]
          },
          {
            name: '搜索引擎',
            type: 'line',
            stack: '总量',
            label: {
              normal: {
                show: true,
                position: 'top'
              }
            },
            areaStyle: {},
            data: [820, 932, 901, 934, 1290, 1330, 1320]
          }
        ]
      }

      // 使用刚指定的配置项和数据显示图表。
      myChart.setOption(option)
    }
  }
}
</script>

<style lang="less" scoped>
.el-card {
  margin-top: 30px;
}
</style>
